/Engine/Source/Runtime/GeometryCore/Public/Implicit/SDFCalculationUtils.h
These are utility functions shared by the various SDF calculation implementations (CachingMeshSDF, SweepignMeshSDF, SparseNarrowBandMeshSDF)
namespace UE { namespace Geometry { double UE::Geometry::PointTriangleDistance ( const FVector3d & x0, const FVector3d & x1, const FVector3d & x2, const FVector3d & x3 ) } }